Grinding and polishing machine.



N0} 762,766 PATENTED JUNE 14, 1904.-

' L. ,SGHULTE.

GRINDING AND POLISHING MACHINE.

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PATEN'IED JUNE 14, 1904.

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GRINDING AND POLISHING MACHINE.

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PATENTED JUNE 14, 1904.

L. SGHULTE.

GRINDING AND POLISHING MACHINE.

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GRINDING AND POLISHING MACHINE.

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No. 762,766. Y 'PATENTED JUNE 14,1904.

L-. SGHULTE.

GRINDING AND. POLISHING MACHINE.

APPLIUAIION FILED NOV. 30. 1903.

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HNIVTIED Y STATES Patented June 14, .1904.

PATENT OFFICE.

GRINDING AND POLISHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 762,766, dated-Tune 14, 1904. Application fil d November so, 1903. Serial No. 183,257. (No model.)

To all whom it may concern:

Be it known that I, LOUIS SOHULTE, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented new and useful Improvements in Grinding and Polishing Machines, of which the following is a specification.

My invention relates to new and useful improvements in machines for grinding and polishing metal sheets, such as sheet steel, iron, copper, zinc, and brass. Its object is to provide a compact machine of this character which can polish sheets of large sizes and which is so constructed as to firmly support all portions of the face of the sheet so as to prevent the same from bending or twisting during the grinding and polishing operation.

A further object is to employ means whereby the sheet to be polished is held perfectly level while being operated upon.

Another object of the invention is to provide buffing-rollers which are adapted to be shifted longitudinally during the rotation thereof.

A further object is to employ a longitudinally-movable sheet-supporting table having means for reversing it automatically when the same reaches the limit of its movement in one direction.

Another object is to provide means for adjusting. the table from or toward the buflingrollers. I

Another object is to employ a clamp of novel construction for securely fastening the sheet to the table without marring or otherwise injuring the same.

WVith the above and other objects in view the invention consists of a stationary frame having buffing-rollers journaled thereon, and within this frame is a vertically-adjustable shaft having gears thereon which mesh with parallel racks extending longitudinally under a table. This table is supported upon longitudinallyadjustable standards which are mounted on wheels adapted to travel on a track provided therefor. Means are employed whereby motion maybe transmitted from one of the drive-shafts to the adjustableshaft above referred to, and automatic reversing mechanism is employed for returning the table to its first position when the same reaches the limit of its movement in one direction.

The invention also consists of an eccentric which is engaged by levers which are adapted to swing in opposite directions alternately, and thereby shift the bufling-rollers from side to side as they rotate.

The invention also consists in the further novel construction and combination of parts hereinafter more fully described and claimed, and illustrated in the accompanying drawings, showing the preferred form of my invention, and in which Figure 1 is a side elevation of my improved grinding and polishing machine. Fig. 2 is a plan view thereof. Fig. 3 is a section on line '3 3, Fig. 1. Fig. 1 is a section on line 1 4, Fig. 3. Fig. 5 is an enlarged end elevation of the shifting mechanism of the bufling-rollers. Fig. 6 is a side elevation thereof. Fig. 7 is an enlarged longitudinal section through the table-clamp and showing a sheet in position therein. Fig. 8 is a vertical section through one end of the table and its adjustable supporting-Standard, and Fig. 9 is a rear elevation of one of said standards.

Referring to the figures by numerals of reference, 1O 10 are uprights which form the.

sides of a stationary frame having boxes 11 thereon, in which are slidably mounted revoluble shafts 12. On each shaft is secured a buffing-roller 13 of any suitable size and material. Each upright 10 has a vertical slot 14 therein, and the side walls of said slot are grooved, as shown at 15, for the reception of a slide 16. Revolubly mounted in all of these slides is a shaft 17 upon which are secured gears 18, which are located between two of theuprights 10. Gears 19 and 20, of different diameters, are also secured to the shaft 17 adjacent the other end thereof, and gear 20 meshes atall times with an intermediate gear 21, journaled upon one of the uprights 10, while said intermediate gear and the gear 19 mesh with gears 22 and 23, respectively. These last-mentioned gears are loosely mounted on a drive-shaft 24, having a pulley 25, upon which a belt (not shown) is adapted to. be arranged. The inner or adjoining faces of the gears 22 and 23 are toothed, as shown at Ioo 26, and are adapted to be alternately engaged by the opposite faces of a clutch 27, which is feathered on the shaft 24 and rotates therewith. This clutch has a ring 28 mounted thereon, and the ring is connected, by means of a rod 29, with a lever 30, pivoted to one of the slides 16 and having a handle 31, by means of which it may be readily shifted manually.

An upright arm 32 is loosely mounted on the shaft 17 and the upper end of this armis provided with a recessed head 33, in which is slidably mounted a plunger 34, which is held normally projected from the head by means of a coiled spring 35. The lower end of the plunger is connected, by means of a rod 36, with a bell-crank lever 37, pivoted to the lower portion of arm 32, and this bell-crank lever is connected, by means of a link 38, with a rod 39, slidably mounted in a bracket 40, extending from the rod-29. Rod 39 is also slidably mounted in one of the slides 16 and is connected to the lever at a point adjacent the end of rod 29. A coiled spring 40 is located on rod 39 and bears at opposite ends upon the slide 16 and upon a collar 41, se-

, cured to the rod 39.

A rod 42 is revolubly mounted within brackets 43, located at the lower ends of the uprights 10 and adjacent the slides 16. This rod has a worm 44 thereon in vertical alinement with each slide 16, and these worms mesh with worms 45, which are secured to the lower ends of threaded rods 46, revolubly mounted within and engaging the slides 16. Rod 42 is adapted to be rotated by placing a key in engagement with one end thereof, and the screws 46 can therefore be simultaneously rotated in one direction and the slides 16 raised or lowered in unison, so as to take up wear upon the gears on shaft 17 or to remove said gears from engagement with the parts normally meshing therewith.

The shafts 12 of the bufling-rollers 13 are, as hereinbefore stated, slidably mounted within their bearings. Each shaft is loosely engaged by pins 47, which extend inward from a yoke 48, arranged at the upper end of a lever 49. This lever is fulcrumed in brackets 56, secured to one of the uprights 10, and extends downward to one side of a cylinder 51, having a cam-groove 52 therein, which is adapted to be engaged by a pin 53, extending from the lever 49. It will be understood that the two shafts 12 are each provided with one of these levers 49 and that the opposite sides of the cylinder 51 are engaged thereby. The groove 52 is so shaped that the levers 49 will be swung in opposite directions alternately as the cylinder rotates. This cylinder is revolubly mounted on a pin 54 and rotates with a pulley 55, adapted to be driven by a belt 56, arranged thereon.

A track 57 extends between two of the uprights 10 and below the gears 1.8, and mounted on this track are wheels 58, which are ar ranged on axles 59. Each axle has a block 60 supported thereby at each end, and longitudinally-extending rods 61 connect the blocks of the two axles to form a rigid frame. A standard 62 is detachably connected to each block 60 and to a head 63, having a recess 64 in its upper face. Revolubly mounted in the head and extending through the recess is a screw 65, having a worm 66 at its lower end, which is engaged by a shoe 67, secured to and revoluble with a shaft 68, journaled in the head. A handle 69 is connected to this shaft, and by means thereof worm 67 can be rotated and rotary motion transmitted through worm 66 to the screw 65. A collar 70 is arranged on the screw and within the recess 64 and forms a bearing for limiting the downward movement of the screw. Each screw projects. into a tubular hanger 71, having a detachable internally-screw-threaded collar 72 atits lower end, which is engaged by the screw 65. It will then be seen that when screw 65 is rotated in the manner above described the hanger 71 thereof can be adjusted vertically to any desired position. The hanger 71 is secured to the ends of the side beams 73 of a table. These side beams have cross-bars 74 connecting them at suitable intervals, and a top plate 75 is fastened upon the side beams 5 and cross-bars. Parallel longitudinally-extending racks 76 are secured to the lower faces of the cross-bars 74 and mesh with the gears 18, hereinbefore described. A camstrip 77 is also arranged longitudinally under and secured to the table, and one end of this strip is curved downward, as shown at 78. This cam-strip is located directly above the arm 32, and the plunger 34 is held in contact therewith at all times by its spring 33, assisted by spring 40.

Secured to the table at one end thereof is a bracket 79, having a vertical revoluble screw 80 journaled therein. A worm 81 is secured to the lower end of this screw, while the upper end thereof engages a clamping-block 82, having a shoulder 83, which is adapted to overhang a curved end of the table and fit snugly thereon. Worm 81 meshes with the worm 84, arranged on a shaft 85, which extends under the end of the table and has a hand-wheel 86 at one end, by means of which the worms can be readily revolved.

In using the machine herein described the sheet of metal to be ground or polished is placed on the top plate 75 of the table and the front end thereof is inserted under the clamp 82. Shaft is then rotated by means of the hand-wheel 86, and worms 84 and 81 are turned, so as to rotate screw 80 and draw the block 82 downward, thereby clamping the sheet between the shoulder 83 and the end of the table. Rotary motion is then transmitted to the buffing rollers13 by means of belts 86, which are mounted on pulleys 87, se-

cured to the shafts 12. Shaft 24 is set in motion and lever 30 is pressed inward,so as to cause the rod 29 to force clutch 27 into engagement with the clutch on gear 23. Motion will thus be transmitted from this gear to gear 19, and

shaft 17 will be revolved and cause the gears 18 thereon to move racks 76 longitudinally. The wheels 58 of the table will therefore be caused to travel on the track 57, and as the table moves under the bufiing-rollers the sheet thereon will be contacted thereby and ground or polished. During this forward movement of the table. the plunger 34 will abut against the cam-strip 77 and remain in practically the same position until the end of the sheet upon the table arrives in position under the rollers 13. At this moment the downwardly-curved portion 78 of the cam-strip 77 will arrive above the plunger 34 and force it downward, thereby compressing the spring 33. Bellcrank lever 37 will be rotated and will draw the rod 39 and the lever 30 inward, thereby causing the rod 29 to shift clutch 27 into engagement with the clutch on gear 22. Motion will thus be transmitted from the gear 22 to gear 21 and thence to gear 20, and the shaft 17 will be reversed and draw the table back to its initial position. A suitable springcatch 88 of any desired construction may be provided for locking the lever 30 after the same has been thrown inward by the depression of the plunger, and the parts will thus be held in position until the table has reached the limit of its return movement, when the lever can be thrown outward manually and the operation above described repeated. During the backward-and-forward movement of the table the pulley 55 is rotated by belt 56 and causes the levers 49 to rock backward and forward alternately, thereby shifting the buffing-rollers from side to side.

Should the faces of the buffing-rollers becomeworn through continual use the table can be adjusted vertically to compensate for such wear by rotating the shafts 68, and thereby revolving the screws and raising the tubu lar hangers 71. To disengage the table from the gears 18, rod 4C2 can be rotated and the slides 16 drawn downward, so as to lowerthe shaft 17 and the parts connected thereto.

In the foregoing description I have shown the preferred form of my invention; but I do not limit myself thereto, as I am aware that modifications may be made therein without departing from the spirit or sacrificing any of the advantages thereof, and I therefore reserve the right to make such changes as fairly fall within the scope of my invention.

Having thus described the invention, what is claimed as new is 1. In a machine of the character described, the combination with a longitudinally-movable table; of rotary buffing-rollers supported thereabove, arevoluble cylinder having acamgroove therein, oppositely-extending levers engaging the groove and adapted to be simultaneously rocked during the rotation of the cylinder, and shafts extending from the rollers and engaged by the levers.

'2. In a machine of the character described, the combination with slotted supports, and a longitudinally-movable table therebetween of slides mounted in the slots, a shaft journaled within the slides, a gear upon the shaft engaging and adapted to operate the table, a drive-shaft journaled Within one of the slides, gears thereon for transmitting motion to the first-mentioned shaft, a screw within each slide, a worm therein, a revoluble rod, and means upon said rod for simultaneously rotating the worms.

3. In a machine of the character described, the combination with uprights having bufiingrollers supported thereby; of a longitudinally,v

movable table below the rollers and comprising walls, adjustable standards supported thereby, side beams mounted upon the standards, cross-bars connecting the side beams, a top plate, and a clamp at one end of the top plate.

4. In a machine of the character described, the combination with uprights, and bufiingrollers supported thereby; of a longitudinallymovable table below the rollers, wheels, heads connected to the wheels, threaded rods revolubly mounted within the heads, tubular hangers engaging and adapted to receive the rods, means for rotating the rods at each end of thetable in unison, side beams connected to the hangers, cross-bars secured to the side beams, and a top plate. a

5. In a machine of the character described, the combination with uprights having buffingrollers supported thereby; of a longitudinallymovable table below the rollers, wheels, standards connected to the wheels, heads on the standards, threaded rods revolubly mounted within the heads, means for rotating the rods at each end of the table in unison, tubular hangers engaging the rods, side beams secured to the hangers, cross-bars connecting the side beams, a top plate, a bracket, and a clamp mounted upon the bracket and adapted to overlap the top plate.

6. In a machine of the character described, the combination with uprights, and buffingrollers supported thereby; of a longitudinallymovable table, a bracket at one end of the table, a screw revolubly mounted within the bracket, a worm thereon, means for rotating the worm and screw, and a clamping-block engaged by the screw and overlapping one end of the table. 1

In testimony whereof I affix my signature i presence of two witnesses.

LOUIS SCHULTE.

Witnesses 7 CHARLES BURCI-IARD, ADOLF MAERZ. 

